Here's an example of two toys together being more than the sum of their parts. 5MadMovieMakers took a toy xylophone and mounted it over a set of Hot Wheels tracks. A group of Hot Wheels '65 Mustangs were aimed at the xylophone, timed to play 374 noted of an original song by EmCee. It sounds simple at the beginning, but escalates into something special quickly. You may marvel at the timing required for this stunt, but the filmmakers admit that it has been edited. -via Laughing Squid
Even with the editing, that had to involve a lot of forethought releasing the cars at the right time.
Abusive comment hidden.
(Show it anyway.)